/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.sparql.function.library;

import java.util.List ;

import org.apache.jena.sparql.expr.ExprEvalException ;
import org.apache.jena.sparql.expr.ExprList ;
import org.apache.jena.sparql.expr.NodeValue ;
import org.apache.jena.sparql.expr.nodevalue.XSDFuncOp ;
import org.apache.jena.sparql.function.FunctionBase ;

/** fn:replace */
public class FN_StrReplace extends FunctionBase {

    @Override
    public void checkBuild(String uri, ExprList args) {
        if ( args.size() != 3 && args.size() != 4 )
            throw new ExprEvalException("fn:replace: Wrong number of arguments: Wanted 3 or 4, got " + args.size()) ;
    }

    @Override
    public NodeValue exec(List<NodeValue> args) {
        if ( args.size() == 3 )
            return XSDFuncOp.strReplace(args.get(0), args.get(1), args.get(2)) ;
        if ( args.size() == 4 )
            return XSDFuncOp.strReplace(args.get(0), args.get(1), args.get(2), args.get(3)) ;
        throw new ExprEvalException("fn:replace: Wrong number of arguments: Wanted 3 or 4, got " + args.size()) ;
    }
}
